These plants include varieties with flowers in the color range from blue and violet to lavender and bluish purple.
| Common Name | Botanical Name |
| Aster | Aster |
| Balloon flower | Platycodon |
| Bellflower | Campanula |
| Blue star | Amsonia |
| Boltonia | Boltonia asteroides |
| Bugloss | Anchusa |
| Cone flower | Echinacea |
| Cupid’s dart | Catananche caerulea |
| Delphinium | Delphinium |
| Dwarf plumbago | Ceratostigma |
| False indigo | Baptisia |
| Geranium | Geranium |
| Globe thistle | Echinops |
| Iris | Iris |
| Lamb’s ears | Stachys |
| Lily-of-the-Nile | Agapanthus orientalis |
| Lungwort | Pulmonaria |
| Lupine | Lupinus |
| Phlox | Phlox |
| Pincushion flower | Scabiosa |
| Plantain lily | Hosta |
| Salvia | Salvia |
| Siberian bugloss | Brunnera |
| Speedwell | Veronica |
| Spiderwort | Tradescantia |
| Stokes’ aster | Stokesia |
| Virginia bluebells | Mertensia |